15. A distracted driver in a residential neighborhood is travelling at 25 miles per hour. The driver takes what they believe to be a brief 1 second
look at a text that they have just received on a cell phone. In just one
second, how far (in feet) will the car travel if the driver fails to hit the
breaks when a child and dog dart in front of the car. *

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm(red) and 486 nm (blue). light from a hydrogen lamp illuminates a diffraction grating with 520lines/mm , and the light is observed on a screen 1.5m behind the grating. part a what is the distance between the first-order red and blue fringes? express your answer to two significant figures and include the appropriate units.

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

Atomic nuclei of almost all elements consist of